Have you received your cruise documents yet? The number should be in that info. I'm sailing on Navigator of the Seas on July 19; the number in my docs (I don't know if this changes on other dates) is 888-724-7447. I'm not sure if this number will connect you directly with NOS or if its a "general" number for RCCL and you then have to indicate the ship you are sailing on. Cost shown was $7.95/minute.